Electkio abo lamp



(no Model.) G PYLE 2 Sheets--Sheet 1.

ELECTRIC ARG LAMP.

No. 556,437. Patented Mar. 17, 1896'.

Ill

' HWENTO WITNESSES.-

'ful Arc Lamp; and I do hereby declare that Fig. (3 is a detail of the connection be- UNITED STATES GEORGE O. PYLE, OF INDIANAPOLIS,

INDIANA, ASSIGNOR OF ONE-HALF TO FRANK H. EWYERS, OF SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 556,437, dated March 17, 1896.

Application filed May 2, 1895. Serial No. 547,888. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE O. PYLE, of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and usethe following is a full, clear, and exact de scription thereof, reference being had to the accompanying drawings, in which like figures refer to like parts.

My invention relates to an arc lamp which is designed especially for use in electric headlights.

Figure 1 is a side elevation of the lamp. Fig. 2 is an elevation showing means for holding the electrodes. Fig. 3 is a sectional view of the base of the lamp-post. Fig. at is a rear elevation of the middle portion of the lamp. Fig. 5 is a cross-section on the line B B of Fig.

tween the main arm and upper-electrodeholding bar. Fig. 7 is a cross-section on the line X X of Fig. 1. Fig. Sis a sectional view on the line C O of Fig. 2. Fig. 9 is a diagram of the circuit.

On a suitable base 1 there is a suitable basepost 2. The main upright or lamp-post 3 is hollowed at its lower end 4 and fitted over the base-post 2, upon which it is vertically adjustable. It is held vertically in place and rendered adjustable by the set-screw 55 and the bolt 56'that extends through the arm 57, the bolt being revolubly secured to the base and having the nuts 58 and 59.

Extending from the upper end of the post 3 is the rigid arm 8, to which the extension 9 is secured with insulation 10 between them. This arm supports the holding-bar 11 for the upper electrode, 12.

The short bracket 13, which is rigidly secured to the holding-bar 11, has on its free end two downwardly-extended jaws 14, with a conical recess between them that fits over the short bolt 15. This renders the holding device for the upper electrode readily detachable. The jaws14t are held and clamped between the extension 9 and the washer 16. Near the upper end of the holding-bar for the upper electrode there is slidably mounted a spring-actuated clamp 17 for gripping and holding the carbon. Between this clamp 17 and the holding-bar is a spring contact-piece 18. The lower end of the upper electrode is held by an arm 19, extended from the lower end of the holding-bar and having a ring 20 on its free end with inwardly extended fingers 21. This is placed at the burned end of the electrode so that its tapering end rests in the ring and upon the ends of the fingers. It is apparent that the electrode cannot fall through, and hence is fed by gravity as it is consumed.

From the lower end of the post 3 I provide the arm 22, on Whose free end there is pivoted a lever for supporting the lower electrode, 24. Its lower end is held by an insulated clamping mechanism 25, while its upper end is held by the ring 26 on the bracket 27 secured with the insulation 28 to the rod 29. This rod is supported by the extension 51 that is secured to the arm 52 on the lower end of the lamp-post. The connection between the two is insulated. The clamping-piece 53 is secured to the extension 51 and is clamped by the bolt 54. The upper end of the rod 29 holds the lower end of the holding-bar 11 in place by means of the bracket 30. The lower electrode is free to move in the ring 26, and through the lever 23 it is automatically moved to regulate the are by the means hereinafter set out.

In electric headlights it is of prime necessity that the light be stationary relative to the reflector. Hence I use a lower electrode made preferably of copper or other suitable metal and the ordinary carbon for the upper electrode. The upper one feeds by gravity to the fingered holder at its lower end, and by such holder the end of the electrode is maintained at a certain position. The lower one is automatically adjusted to regulate the arc. To have this lower electrode light that it may be easily moved for adjustment, I make it of two portions. The upper portion 31 is solid, with a pin 32 at its lower end, while the main portion is hollow. The upper end of the hollow portion receives the pin 32, and is slotted on opposite sides at 33 and provided with a screw-bolt 34: that clamps the pin securely between the split ends.

To the brackets 35 Imount the solenoid 37 having the core 39 securedto the lever 23, and behind this mechanism I provide the rod 40 supported from the arm etl above and extending loosely through an aperture in the extreme end of the lever 23. It is provided with the set-nuts 42 and 4.3 with the spiral spring ti between them.

I lead one portion of the current through the wire 48 to the upper end of the upper electrode and the other portion through the wire if) to the arm 51, through the rod 29, bracket 30, and arm 19 to the lower end of the upper electrode. The negative circuit passes from the lower electrodev through the wire -15, the solenoid and wire 46 to the wire 50.

hat I claim as my invention, and desire to secure by Letters Patent, is

1. In an arc lamp, a suitable holding-bar mounted parallel with the upper electrode, a spring-controlled clamp for grasping the upper end of the electrode and slidably mounted on the holdingbar, and an arm extending from the holding-bar and having on its end a ring with a series of inwardly and downwardly extended fingers or claws to hold and support the electrode at its lower tapering end, substantially as set forth.

2. In an arc lamp, in combination with the upper electrode, a holding-bar held parallel with the electrode, means slidably mounted on the holding-bar for holding the upper end of the eleetrode,an arm extending below from the holding-bar having on its end fingers or claws forsupporting the electrode at its lower tapering end, a positive wire connected with the upper end of the holding-bar and another with its lower end, substantially as set forth.

3. In an arc lamp, a post with an upper and a lower arm, aholding-bar for the upper electrode reinovably mounted on the upper arm and having on its lower end a bracket, and a rod adjustably mounted in the lower arm with its upper end extending loosely through the bracket from the holding-bar and also having an arm for holding in place the upper end of the lower electrode, substantially as set forth.

i. 111 an arc lamp, an upper carbon electrode, a holding-bar parallel therewith having means for loosely holding the upper end oi such electrode in place and an arm with inwardly-turned fingers or claws for supporting the lower tapering end thereof at a certain point, a lower metal electrode, a lever pivoted to the framework supporting the lower electrode on, one end, and an electric regulating mechanism for actuating the other end of such lever whereby the arc is regulated, substantially as set forth.

In witness whereof I have hereunto set in y hand this 27th day of April, 1895.

GEORGE (J. PYLE. \Vitnesses:

V. II. Locmvoon, VIENNA PURov. 

